When reading the file, option names were not passed through
self.optionxform(), which (in the default case) caused options spelled
with opper case letters in their name to be inaccessible.  Reported by
"Todd R. Palmer" <t2palmer@bellsouth.net> on
activepython@listserv1.ActiveState.com.
diff --git a/Lib/ConfigParser.py b/Lib/ConfigParser.py
index e7636b9..16d18d2 100644
--- a/Lib/ConfigParser.py
+++ b/Lib/ConfigParser.py
@@ -440,7 +440,7 @@
                         # allow empty values
                         if optval == '""':
                             optval = ''
-                        cursect[optname] = optval
+                        cursect[self.optionxform(optname)] = optval
                     else:
                         # a non-fatal parsing error occurred.  set up the
                         # exception but keep going. the exception will be